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%I #3 Mar 30 2012 18:37:02
%S 1,4,14,52,217,1033,5604,34416,237328,1822753,15473117,144165763,
%T 1464992791,16144683412,191967912402,2451561765083,33487399558154,
%U 487448547177703,7535687673952024,123349262218035648
%N Column 3 of table A125781; also, equals column 1 of matrix power A091351^2.
%C Column k of triangle A091351 = row sums of matrix power A091351^k for k>=0.
%F a(n) = A091352(n+2) - A091352(n+1) - 1.
%Y Cf. A091351; other columns: A091352, A125782, A125784, A125785, A125786.
%K nonn
%O 0,2
%A _Paul D. Hanna_, Dec 09 2006